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The methods currently used to measure azimuthal distributions of particles in heavy ion collisions assume that all azimuthal correlations between particles result from their correlation with the reaction plane. However, other correlations…

Nuclear Theory · Physics 2009-11-06 Nicolas Borghini , Phuong Mai Dinh , Jean-Yves Ollitrault

We propose a new method to study transverse flow effects in relativistic nuclear collisions by Fourier analysis of the azimuthal distribution on an event-by-event basis in relatively narrow rapidity windows. The distributions of Fourier…

High Energy Physics - Phenomenology · Physics 2011-05-05 S. Voloshin , Y. Zhang

Particle azimuth distributions are widely studied in heavy-ion collisions. They are often expanded in Fourier series to extract anisotropic flow harmonics simultaneously. It was recently proposed that the different orders of flows could…

Nuclear Theory · Physics 2024-01-23 Yicheng Feng

Recently, a complex network based method of Visibility Graph has been applied to confirm the scale-freeness and presence of fractal properties in the process of multiplicity fluctuation. Analysis of data obtained from experiments on…

Data Analysis, Statistics and Probability · Physics 2018-02-13 Susmita Bhaduri , Dr. Dipak Ghosh

The measurement of azimuthal distributions in nucleus-nucleus collisions relies upon the assumption that azimuthal correlations between particles result solely from their correlation with the reaction plane (i.e. flow). We show that at SPS…

Nuclear Theory · Physics 2007-05-23 Nicolas Borghini , Phuong Mai Dinh , Jean-Yves Ollitrault

The azimuthal distributions of photons and charged particles with respect to the event plane are investigated as a function of centrality in Pb + Pb collisions at 158 A GeV/c in the WA98 experiment at the CERN SPS. The anisotropy of the…

Nuclear Experiment · Physics 2011-09-13 WA98 Collaboration , M. M. Aggarwal

The strategy and techniques for analyzing anisotropic flow (directed, elliptic, etc.) in relativistic nuclear collisions are presented. The emphasis is on the use of the Fourier expansion of azimuthal distributions. We present formulae…

Nuclear Experiment · Physics 2016-09-08 A. M. Poskanzer , S. A. Voloshin

We define a set of model-independent observables which generally characterize the azimuthal dependence of two-particle correlations in nucleus-nucleus collisions. We explain how they can be analyzed, and show to what extent such analyses…

Nuclear Theory · Physics 2007-05-23 N. Borghini , J. -Y. Ollitrault

In neutrino oscillation experiments, exclusive measurements of neutrino-nucleus interactions play a critical role, by providing the theoretical and experimental input needed for a reliable estimation of the neutrino energy. In this paper,…

The azimuthal anisotropy of jet spectra due to energy loss of jet partons in azimuthally non-symmetric volume of dense quark-gluon matter is considered for semi-central nuclear interactions at collider energies. We develop the techniques…

High Energy Physics - Phenomenology · Physics 2016-09-06 I. P. Lokhtin , L. I. Sarycheva , A. M. Snigirev

The recent availability of precisely measured fusion cross-sections has enabled the extraction of a representation of the distribution of barriers encountered during fusion. These representations, obtained from a variety of reactions,…

Nuclear Experiment · Physics 2009-10-30 M. Dasgupta , D. J. Hinde , J. R. Leigh , K. Hagino

Azimuthal distributions of charged particles and intermediate mass fragments emitted in Au+Au collisions at 600AMeV have been measured using the FOPI facility at GSI-Darmstadt. Data show a strong increase of the in-plane azimuthal…

Nuclear Experiment · Physics 2009-10-30 P. Crochet , F. Rami , R. Dona , the FOPI Collaboration

Azimuthal anisotropy is a key observation made in ultrarelativistic heavy-ion collisions. This phenomenon has played a crucial role in the development of the field over the last two decades. In addition to its interest for studying the…

Nuclear Experiment · Physics 2023-10-20 Jean-Yves Ollitrault

A method is proposed to measure the relative azimuthal angle distributions involving two or more event planes of different order in heavy ion collisions using a Fourier analysis technique. The analysis procedure is demonstrated for…

Nuclear Theory · Physics 2013-07-31 Jiangyong Jia , Soumya Mohapatra

A method is suggested to deduce the anisotropy in neutral pions by measuring the azimuthal anisotropy of photons in ultra-relativistic nuclear collisions. The ratio of the estimated anisotropy in photons to the anisotropy in neutral pions…

Nuclear Experiment · Physics 2009-10-31 Rashmi Raniwala , Sudhir Raniwala , Yogendra Pathak Viyogi

Smashing nuclei at ultrarelativistic speeds and analyzing the momentum distribution of outgoing debris provides a powerful method to probe the many-body properties of the incoming nuclear ground states. Within a perturbative description of…

Nuclear Theory · Physics 2025-04-04 Thomas Duguet , Giuliano Giacalone , Sangyong Jeon , Alexander Tichai

The methods currently used to measure collective flow in nucleus--nucleus collisions assume that the only azimuthal correlations between particles are those arising from their correlation with the reaction plane. However, quantum HBT…

Nuclear Theory · Physics 2009-10-31 Mai Dinh , Nicolas Borghini , Jean-Yves Ollitrault

Azimuthal correlations of particles produced in nucleus-nucleus collisions at CERN SPS are discussed. The correlations quantified by the integral measure Phi are shown to be dominated by effects of collective flow.

Nuclear Theory · Physics 2012-07-23 Katarzyna Grebieszkow , Stanislaw Mrowczynski

We analyze azimuthal anisotropy in heavy ion collisions related to the reaction plane in terms of standard reggeon approach and find that it is nonzero even when the final state interaction is switched off. This effect can be interpreted in…

High Energy Physics - Phenomenology · Physics 2008-12-18 K. G. Boreskov , A. B. Kaidalov , O. V. Kancheli

We show that the statistics of fluctuation-driven initial-state anisotropies in proton-proton, proton-nucleus and nucleus-nucleus collisions is to a large extent universal. We propose a simple parametrization for the probability…

Nuclear Theory · Physics 2014-03-05 Li Yan , Jean-Yves Ollitrault
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